US20200046195A1 - Dry sheet for cleaning - Google Patents

Dry sheet for cleaning Download PDF

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Publication number
US20200046195A1
US20200046195A1 US16/344,794 US201716344794A US2020046195A1 US 20200046195 A1 US20200046195 A1 US 20200046195A1 US 201716344794 A US201716344794 A US 201716344794A US 2020046195 A1 US2020046195 A1 US 2020046195A1
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United States
Prior art keywords
parts
surface layer
fiber
interlaced
cleaning
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Abandoned
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US16/344,794
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English (en)
Inventor
Naoki Shintani
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Daio Paper Corp
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Daio Paper Corp
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Assigned to DAIO PAPER CORPORATION reassignment DAIO PAPER CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHINTANI, NAOKI
Publication of US20200046195A1 publication Critical patent/US20200046195A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B32B5/265—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/12—Conjugate fibres, e.g. core/sheath or side-by-side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/73—Hydrophobic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2432/00—Cleaning articles, e.g. mops or wipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary

Definitions

  • the present invention relates to a dry sheet for cleaning.
  • dry sheets for cleaning each formed as a fiber sheet formed by interlacing a resin net and fiber.
  • Some of such dry sheets for cleaning have a front surface or a back surface which has been patterned in a bump and dent shape (for example, see Patent Document 1).
  • Patent Document 1 Japanese Patent No. 3537775
  • the fiber of the entire sheet is interlaced in a state where the dry sheet is along the bump and dent shape. That is, in the bump and dent shape, the bump parts and the dent parts are formed on the respective front side and back side and combined with each other. Accordingly, the bump parts are also affected by the interlacing of the fiber. As a result, the density of the fiber forming the bumps and dents is substantially uniform in the entire sheet. In other words, the collection efficiency and collection characteristics of the entire sheet are substantially uniform, and there is a problem that the collection efficiency varies depending on the weight and size of the objects to be collected such as trash and dust.
  • An object of the present invention is to provide a dry sheet for cleaning which exhibit excellent collection efficiency regardless of the weight and shape of the objects to be collected.
  • a dry sheet for cleaning includes:
  • the dry sheet for cleaning has the highly interlaced parts in which fiber is interlaced in a density higher than in the slightly interlaced parts in the interlaced part in the front surface layer and the back surface layer.
  • the dry sheet for cleaning has spots having different fiber densities in each of the front surface layer and the back surface layer.
  • the dry sheet for cleaning exhibits different collection efficiencies and collection characteristics on the spots having different fiber densities, that is, at the highly interlaced parts and the slightly interlaced parts, so as to suitably collect the objects to be collected having different weights and sizes at the respective spots.
  • the dry sheet for cleaning can be bulky and exhibit improved collection efficiency.
  • the highly interlaced parts in the front surface layer are formed corresponding to and at almost same spots as the highly interlaced parts in the back surface layer.
  • the highly interlaced parts are formed at different spots, it is not possible to obtain the assumed bulkiness, for example, since the water-jet interlacing is intended to be done only on one side, but is also done on the opposite side in practice.
  • there is no such disadvantage according to the present invention That is, since the spots hit by the water flow are to be the highly interlaced parts in both layers, unnecessary interlacing is not done at the slightly interlaced parts.
  • the fiber diameter of the polyethylene terephthalate fiber constituting the hydrophobic fiber is 3.3 dtex or more, the rigidity (cushioning property) of the fiber improves, making it possible to handle the dry sheet with a little force.
  • polyethylene terephthalate fiber with a large fiber diameter of 3.3 dtex or more contributes to keeping inter-fiber voids so that the objects to be collected are suitably collected.
  • the highly interlaced parts are formed in an area ratio of 20 to 90% to an area of the front surface layer and the back surface layer in a plan view, it is possible to suitably set the distribution and rate of the parts having different fiber densities.
  • the dry sheet for cleaning can collect trash and/or dust at the parts with high fiber density and the parts with low fiber density alternately. Since various kinds of dust and dirt can be collected at each of the highly interlaced parts and the slightly interlaced parts, the dry sheet exhibits good collection efficiency.
  • the dry sheet for cleaning according to the present invention exhibits excellent collection efficiency regardless of the weight and shape of the objects to be collected.
  • FIG. 1 is a schematic perspective view of the dry sheet for cleaning in an embodiment of the present invention.
  • FIG. 2A is a schematic cross-sectional view of the dry sheet for cleaning in an embodiment of the present invention.
  • FIG. 2B is a schematic cross-sectional view of the dry sheet for cleaning in an embodiment of the present invention.
  • FIG. 2C is a schematic cross-sectional view of the dry sheet for cleaning in an embodiment of the present invention.
  • FIG. 3 is a schematic perspective exploded view of the dry sheet for cleaning in an embodiment of the present invention.
  • FIG. 4 is a schematic drawing of a patterning of the dry sheet for cleaning in an embodiment of the present invention.
  • FIG. 5A is a schematic drawing showing a test method of Examples and Comparative Examples in the present invention.
  • FIG. 5B is a schematic drawing showing a test method of Examples and Comparative Examples in the present invention.
  • the dry sheet for cleaning in the embodiment of the present invention is described on the basis of FIGS. 1 to 4 .
  • the dry sheet for cleaning 1 is provided with an inner layer 2 as a nonwoven fabric layer and outer layers 3 as fiber layers.
  • the inner layer 2 is an intermediate layer arranged between the outer layers 3 described later and formed of a nonwoven fabric.
  • the inner layer 2 is preferably a spun bond nonwoven fabric from the viewpoint of durability.
  • the durability is preferably 15 (N/5 cm) or more in a wiping direction (CD direction) on the surface for cleaning and 35 (N/5 cm) or more in a direction (MD direction) perpendicular to the CD direction.
  • the grammage of the inner layer 2 is preferably set to be in the range of 13 to 20 g/m 2 .
  • Natural fiber such as pulp, cotton, and hemp and cellulosic chemical fiber such as rayon and acetate may be used for the inner layer 2 .
  • the wiping direction of the surface for cleaning is a direction perpendicular to the longitude direction of a predetermined tool to which the dry sheet for cleaning is attached. That is, it is a direction along the moving direction during cleaning.
  • the outer layers 3 form a front surface layer and a back surface layer of the dry sheet for cleaning 1 and are each mainly formed of hydrophobic fiber. Specifically, the weight ratio of the contained hydrophobic fiber to the total weight of the outer layers 3 is 50 to 99%.
  • Water is poured with a small water pressure of less than 20 kPa to the whole area of the outer layers 3 in pre-interlacing to combine the inner layer 2 and the outer layers 3 , and after that, the first water-jet interlacing is done with a water pressure of 20 to 30 kPa. After that, the bump and dent shape is formed by second water-jet interlacing with a water pressure of 60 to 80 kPa for spot(s) to be patterned part(s) 31 described later.
  • the patterned part 31 is formed such that the pattern of bump and dent shape on the front surface layer corresponds to that on the back surface layer at the same spots.
  • Chemical fiber mainly composed of polyethylene terephthalate, polypropylene, polyethylene, etc. are used as the outer layers 3 .
  • the polyethylene terephthalate fiber is preferably included at a rate of 80% or more, and the fiber diameter is preferably 3.3 dtex or more.
  • the fiber With the fiber diameter of 3.3 dtex or more, the fiber has improved rigidity (cushioning property), and it is possible to handle the dry sheet with a little force. Moreover, polyethylene terephthalate fiber with a large fiber diameter of 3.3 dtex or more may contribute to keep inter-fiber voids so that the objects to be collected such as trash and dust are suitably collected.
  • the outer layers 3 each include the patterned part(s) 31 as highly interlaced part(s) and non-patterned part(s) 32 as slightly interlaced part(s).
  • the second water-jet interlacing is done on the outer layers 3 which have been combined by the first water-jet interlacing.
  • the fiber after the second water-jet interlacing is entangled more than that only after the first water-jet interlacing such that the patterned part 31 is formed. Therefore, the fiber density of the patterned part 31 is higher than that of the non-patterned part 32 .
  • the patterned part 31 has a concaved shape deeper than the non-patterned part 32 . That is, the patterned part 31 has a bottom 311 which is the bottom of the dent and an inclined part 312 which is an inclined surface connecting the non-interlaced part 32 described later and the bottom 311 .
  • the water-jet interlacing of the outer layers 3 is done at the corresponding parts (at the same spots) from both surfaces. That is, the patterned parts 31 are formed at the corresponding parts (at the same spots) on the outer layers 3 (on the front surface layer and on the back surface layer).
  • the bulky fiber of the opposite surface layer may be also crushed and diminished in size even without water-jet being interlaced.
  • the patterned parts 31 are extended along the direction (MD direction) perpendicular to the wiping direction (CD direction) when the dry sheet for cleaning 1 is used.
  • the patterned parts 31 are formed in multiple rows separated from each other at predetermined intervals.
  • An area ratio of these patterned parts 31 are 20 to 90% with respect to the surface area, in a plan view of the front surface or the back surface of the dry sheet for cleaning 1 .
  • the area ratio is calculated using a unit length determined to be the width of one of the patterned parts 31 and a unit length determined to be the width of one of the non-patterned parts 32 in the CD direction. For example, if the width of the patterned part 31 is 3 mm and the width of the non-patterned part 32 is 12 mm, the area ratio is 20%.
  • the area ratio represents a ratio between the patterned surface A and the non-patterned surface B, where the patterned surface A is a surface area in a plan view of the patterned parts 31 and the non-patterned surface B is a surface area in a plan view of the non-patterned parts 32 .
  • the area ratio is calculated by the following formula.
  • the outer layers 3 each have a grammage of 20 to 25 g/m 2 and include two or more kinds of chemical fiber (synthetic fiber) in combination.
  • non-patterned parts 32 are not subjected to the second water-jet interlacing, they are not affected by compression other than the fiber compression resulting from the pre-interlacing or the first water-jet interlacing, and have fiber density less than that of the pattered parts 31 . In other words, in the non-patterned parts, fiber is easy to move freely.
  • These non-patterned parts 32 mainly slide on the surface to be cleaned during wiping operation with the dry sheet for cleaning 1 . That is, they may greatly contribute to the collection property of the dry sheet 1 for cleaning.
  • the dry sheet for cleaning 1 has the outer layers 3 as collection surfaces in which the patterned parts 31 with high fiber density and the non-patterned parts 32 with low fiber density are alternately arranged.
  • the parts with high fiber density have high collection efficiency for heavy trash, and the parts with low fiber density have high collection efficiency for light trash.
  • the ratio between the patterned parts 31 and the non-patterned parts 32 is in the range of 20-80% according to the present invention, it is possible to preferably balance the collection efficiency of heavy trash with that of light trash.
  • the dry sheet for cleaning 1 is provided with the patterned parts 31 having higher fiber density than the other parts in the front surface layer and the back surface layer. That is, the front surface layer or the back surface layer of the dry sheet for cleaning 1 have parts having different fiber densities.
  • the patterned parts 31 in the front surface layer are formed corresponding to and at almost same spots as the patterned parts 31 in the back surface layer.
  • the patterned parts 31 are formed at different spots, it is not possible to obtain the assumed bulkiness, for example, since the water-jet interlacing is intended to be done only on one side, but is also done on the opposite side in practice .
  • the dry sheet for cleaning 1 can be bulky and exhibit improved collection efficiency.
  • the area ratio of the patterned parts 31 are 20 to 90% with respect to the front or back surface in a plan view, it is possible to suitably set the distribution and rate of the spots having different fiber densities and to achieve excellent collection efficiency for various kinds of trash.
  • the dry sheet for cleaning 1 can collect trash and/or dust at the patterned parts 31 and the non-patterned parts 32 alternately. Since various kinds of dust and dirt can be collected at each of the patterned parts 31 and the non-patterned parts 32 , the dry sheet exhibits good collection efficiency.
  • the patterned parts 31 and the non-patterned parts 32 are both formed by water-jet interlacing, specifically, respectively formed by pre-interlacing and by further interlacing for patterning.
  • water-jet interlacing specifically, respectively formed by pre-interlacing and by further interlacing for patterning.
  • the non-patterned parts 32 are also pressed by the roll such that the fiber at the non-patterned parts 32 is also crushed. This results in smaller difference in fiber density and a reduced variety in collection efficiency.
  • the patterned parts 31 are pressed by water with high pressure in the interlacing for patterning, there is no such disadvantage according to the present embodiment.
  • the outer layers 3 were fibrous webs including polyethylene terephthalate as a main component and the inner layer 2 was a spun bond nonwoven fabric.
  • the outer layers 3 were each composed of hydrophobic fiber by 100%, where polyethylene terephthalate was contained by 90% as the hydrophobic fiber and core-sheath fiber of polypropylene and polyethylene was contained by 10% as binder fiber.
  • the polyethylene terephthalate fiber of 3.3 dtex in fineness and the binder fiber of 1.7 dtex in fineness were used.
  • the width of the respective patterned parts 31 formed on the outer layers 3 was 3 mm in the CD direction, and the width of the respective non-patterned parts 32 was 12 mm in the CD direction. That is, the area ratio of the patterned parts 31 to the surface area of the outer layers 3 in a plan view was 200 .
  • the width of the respective patterned parts 31 formed on the outer layers 3 was 6 mm in the CD direction, and the width of the respective non-patterned parts 32 was 6 mm in the CD direction. That is, the area ratio of the patterned parts 31 to the surface area of the outer layers 3 in a plan view was 50%.
  • the width of the respective patterned parts 31 formed on the outer layers 3 was 12 mm in the CD direction, and the width of the respective non-patterned parts 32 was 3 mm in the CD direction. That is, the area ratio of the patterned parts 31 to the surface area of the outer layers 3 in a plan view was 80%.
  • the width of the respective patterned parts 31 formed on the outer layers 3 was 13 mm in the CD direction, and the width of the respective non-patterned parts 32 was 2 mm in the CD direction. That is, the area ratio of the patterned parts 31 to the surface area of the outer layers 3 in a plan view was 87%.
  • the width of the respective patterned parts 31 formed on the outer layers 3 was 15 mm in the CD direction, and the width of the respective non-patterned parts 32 was 0 mm in the CD direction. That is, the area ratio of the patterned parts 31 (strictly speaking, not the patterned parts 31 but a processed part where interlacing for patterning has been done in this Example) to the surface area of the outer layers 3 in a plan view was 100%.
  • the width of the respective patterned parts 31 formed on the outer layers 3 was 0 mm in the CD direction, and the width of the respective non-patterned parts 32 was 15 mm in the CD direction. That is, the area ratio of the patterned parts 31 to the surface area of the outer layers 3 in a plan view was 0%.
  • the width of the patterned parts 31 formed on the outer layers 3 was 2 mm in the CD direction, and the width of the non-patterned parts 32 was 14 mm in the CD direction. That is, the area ratio of the patterned parts 31 to the surface area of the outer layers 3 in a plan view was 13%.
  • the dry sheet for cleaning 1 of Comparative Example 4 had the outer layers 3 including fibers of the same kinds as but at different blend ratio from the fibers in the Examples, and evaluated.
  • the outer layers 3 included PET of 3.3 dtex by 70% and binder fiber by 30%.
  • the width of the respective patterned parts was 6 mm and the width of the respective non-patterned parts was 6 mm (patterning rate 50%), as well as in Example 2.
  • the test method involved attaching the dry sheet for cleaning 1 to a fixing tool of the dry sheet for cleaning 1 not described in the drawings and wiping the floor surface formed of an acryl board by sliding on it.
  • a flat board member was attached to the tip of a stick member (grip), rotatable in all the directions.
  • the dry sheet for cleaning 1 was attached to the flat board member.
  • a weight of 450 g was attached to the flat board member so that the pushing pressure between the dry sheet for cleaning 1 and the floor surface was constant.
  • the dry sheet for cleaning 1 was moved by 25 cm from the center to the right, by 50 cm to the left, and by 25 cm to the right again, on the surface to be wiped of 50 cm in width to go and back a single time on the surface to be cleaned.
  • the test was executed for three kinds of objects to be collected, dust, sesame seed for heavy trash, and hair for light trash.
  • hairs H were wiped as 3 hairs H were placed along the wiping direction and 2 hairs H were placed perpendicular to the wiping direction, as shown in FIGS. 5A and 5B .
  • Sesame seeds were arranged in three rows which each include three, four, and three seeds in this order placed perpendicular to the wiping direction.
  • JIS Z 8901 test powders 1 No. 7 which passed through a sieve of 200 mesh were obtained by 0.2 g and placed in a bordered area of 5 cm ⁇ 15 cm of the floor surface. Then, the amount of dust wiped off was checked visually and evaluation was made from A (dust was caught) to C (dust was not caught) was made.
  • Comparative Example 1 where a patterning rate was 100%, collection efficiency of equal to or more than those according to Examples 1 to 3 could be exhibited as for sesame seeds S, for which five or six out of ten could be collected, however, collection efficiency could be hardly exhibited as for hairs H, for which zero or one out of five was collected.
  • Comparative Example 4 where the blending ratio of PET fiber (3.3 dtex) is smaller than Examples by 20% and the patterning rate was 50%, collection efficiency could be hardly exhibited as for sesame seeds S, for which one out of ten was collected, or as for hairs H, for which one out of five was collected. Further, according to Comparative Example 4, collection efficiency for dust was also poor.
  • the present invention is suitably applicable for a dry sheet for cleaning.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
US16/344,794 2016-10-31 2017-10-31 Dry sheet for cleaning Abandoned US20200046195A1 (en)

Applications Claiming Priority (3)

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JP2016213895A JP6456898B2 (ja) 2016-10-31 2016-10-31 清掃用ドライシートの製造方法
JP2016-213895 2016-10-31
PCT/JP2017/039306 WO2018079825A1 (ja) 2016-10-31 2017-10-31 清掃用ドライシート

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EP (1) EP3533370B1 (enExample)
JP (1) JP6456898B2 (enExample)
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WO (1) WO2018079825A1 (enExample)

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CN109862818A (zh) 2019-06-07
JP6456898B2 (ja) 2019-01-23
JP2018068780A (ja) 2018-05-10
EP3533370B1 (en) 2024-09-11
EP3533370A4 (en) 2020-04-01
WO2018079825A1 (ja) 2018-05-03
EP3533370A1 (en) 2019-09-04

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